Car-brake.



Patented 311111.30, |902. J. H. DEMAY F. HDYLANDIR.

.CAR BRAKE.

(Application Bled Jan. 29, 1902.)

3 mmm/cou Mag (No Model.)

UNITED STATES PATENT OFFICE.

JOHN II. DE MAY AND FREDRICK I-IOYLAND, JR., OF JACKSON, MICHIGAN.

CARA-BRAKE.

SECIFICATION formingpart of Letters Patent No. 709,884, dated September30, 1902.

l Anplieation filed January 29, 1902. Serial No. 91,800. (No model.)

To all whom it may concern.'

Be it known that we, JOHN H. DE MAY and FREDRICK HOYLAND, J r., citizensof the United States, residing at Jackson, in the county of Jackson andState of Michigan, have invented certain new-and useful Improvements inOar-Brakes; and we do hereby declare the following to be a full, clear,and exact description. of the invention, such as will enable othersskilled in the art to which it appertains t0 make and use the saine.

This invention has relation to operating means for manually setting thebrakes of rolling-stock, such as freight-cars and like carriers, thepurpose being to enable the brakes being quickly and irmly applied whenrequired.

Inasmuch as the invention is particularly designed for use in connectionwith freightcars, it is so illustrated, although within the purview ofthe invention it maybe applied wherever it is required to set a brakeeither by hand or other power.

With these ends in view and such others as appertain to the nature ofthe invention the latter consists of the novel features and details ofconstruction which hereinafterV will be more particularly set forth,illustrated, and nally claimed.

In the accompanying drawings, forming a part of the specication, Figure1 is a top View of a brake-setting mechanism embodying the essentialfeatures of the invention. Fig. 2 is aside view thereof, showing` an endportion of a freight-car. Fig. 3 is a top view of a modification.

Corresponding and like parts are referred to in the followingdescription and indicated in all the views of the drawings by the samereference characters. i

The frame 1, supporting the working parts, is approximately of U formand is provided with lateral anges 2 along its upper longitudinaledges'for attachment of the mechanism to the platform or other structureto which the mechanism is to be applied, said iianges being aperturedvto,receive the bolts or fastenings whereby the frame is secured when inplace. Shafts 3-and 4 are disposed in parallel relation and arejournaled at their ends in the side portions of the frame l. A drum 5 ismounted upon the shaft 3 so as to turn therewith and has an offstandingportion 6, notched to receive a link of the chain 7, by means of whichpower is transmitted to the brake-beam when it is required to apply thebrake. The open end of the notch formed in the part 6 is closed by a pin8, which prevents outward displacement'of the link when placed withinthe notch. A pinion 9 is mounted upon the shaft 3, so as .to rotatetherewith and with the drum 5.

A gear element 10 is keyed to the shaft 4 and' is p'rovided with toothedportions 1l and 12 of dierent radius, the teeth 11 being in mesh withthe pinion 9 and the teeth 12 intermeshing with a worm 13, journaledvertically near the outer end of the frame 1. The teeth 12 are formed ona smaller circle than the teeth 11. Hence movement imparted to thetoothed portion 12 is augmented by the toothed portion l1. The gearelement 10 by reason of its construction and function maybe properlydesignated as a differential-speed gear. The worm 13 is journaled at itsupper end in a bearing 14, extended inward from a side of the frame nearits front end and in a bearing 15, bolted or otherwise secured to thelower portion of the4 side/having the bearing 14, the bearings 14 and 15being in vertical alinement. The brake-setting shaft 16 may be fitted tot-he worin 13 or form a part thereof and is adapted to be operated inthe usual way.

In the construction shown in Fig. 3 the Vshaft 3 is provided with twodrums 5, and the pinion 9 is located between the inner ends of saiddrums, thereby equalizing thev strain upon both ends of the shaft andframe. The draft-chains 7, connected at one end with the drums 5, haveconnection at the opposite end with a beam 17, to which a chain 18 iscentrally attached for'transmitting the force to the brake to be set.

The effective length of the chain 7 may be regulated by itting a linkthereof into the notch of the offstanding part 6 of the drum 5, the linkbeing held in place by the pin 8. Upon turning the shaft 16 the worm 13is rotated and effects a turning of the differentialspeed gear 10 and a`rotation of the drum 5, whereby the chain 7 is wound vthereon and thebrake applied, as will be readily comprehended.

IOO

Having thus described the invention, what is claimed as new is- 1. Inbrake-setting mechanism, a drum adapted to be connected with the braketo be applied, a pinion connected for rotation with the drum, a worm, abrake-setting shaft for actuating the said worm, and a differentialspeedgear havingit-s toothed portions in mesh with, respectively, the saidWorm and pinion, substantially as set forth.

2. In brake-setting mechanism, a frame of approximately U form, parallelshafts jonrnaled in the longitudinal or side portions of the frame, adrum secured to the innermost shaft, a dierential-speed gear keyed tothe other shaft and having the toothed portion of greater diameter inmesh with the teeth of a pinion connected for rotation with the saiddrum, and a Worm -gear in mesh with the other toothed portion of thedifferential-speed JOllN H. DE MAY. FREDRICK IIOYLAND, JR,

Witnesses:

Jos. WEINHOLD, L. A. HARMON.

